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Flexible fiberoptic endoscopy of the cochlea: human temporal bone studies
1Department of Otolaryngology, University of Miami School of Medicine, FL 33101.
The American Journal of Otology
|January 1, 1991
Summary
New flexible fiberoptic endoscopes can visualize the cochlea during cochlear implantation surgery. This technology may help surgeons assess electrode insertion feasibility in cases of cochlear ossification.
Area of Science:
- Otolaryngology
- Biomedical Engineering
- Surgical Innovation
Background:
- New bone formation (ossification) in the cochlea complicates cochlear implantation.
- High-resolution CT scans often fail to accurately assess the extent of cochlear ossification.
- Determining electrode insertion feasibility before surgery is challenging.
Purpose of the Study:
- To evaluate the efficacy of novel flexible fiberoptic otologic endoscopes for visualizing the cochlear interior.
- To assess the safety and potential damage caused by endoscope use in the cochlea.
- To determine the feasibility of using this technology during cochlear implantation.
Main Methods:
- Development of 0.7 mm and 1.0 mm flexible fiberoptic otologic endoscopes.
- Ten formalin-fixed human temporal bones were studied.
- Endoscope passage through the scala tympani was attempted, and visualization capabilities were assessed.
Main Results:
- The endoscope successfully passed through the inferior scala tympani.
- Normal and abnormal structures within the cochlea were identifiable.
- Passage beyond the inferior segment caused damage to the spiral ligament.
Conclusions:
- Flexible fiberoptic endoscopes can visualize the cochlear interior.
- The device is effective in the inferior scala tympani but can cause damage if advanced further.
- Human trials for using the endoscope during cochlear implantation are feasible.